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HARRISON 


IMPROVED 


MINING  MACHINE 


FATRNTS 


GREAT  BRITAIN. 

F'BBRUARY  6,  1879. 


UNITED  STATES. 
DECEMBER  25.  1877. 
SEPTEMBER  2.  1879. 

'SEPTEMBER  28,  1880. 
JUNE  20,  1882.  JUNE  21.  1880. 

JULY  25,  1882. 

AUGUST  8,  1882.  CANADA. 

REISSUED. 

OCTOBER  12.  1880.  |    JUNE  3°,  1880. 

NOVEMBER  2,  1880. 


FRANCE. 

SEPTEMBER  2,  1880. 

BELGIUM. 
JUNK  25,  1880. 


GEO.  D,  ^HITCOMB, 

PROPRIETOR, 

No.  206  LA  SALLE  STREET,  CHICAGO. 


^-1882 


HARRISON 


IMPROVED 


MINING  MACHINE 


— )  IP^T  IE  1ST  T  S  .(— 


UNITED  STATES. 

December  25,  1877. 

September  2, 1879. 

September  28, 1880. 
June  20,  1882. 

July  25,  1882. 

August  8, 1882. 

REISSUED. 

October  12, 1880. 

November  2, 1880. 


GREAT  BRITAIN. 
February  6, 1879. 

June  21, 1880. 

CANADA. 

June  30, 1880. 

PRANCE. 

September  2, 1880. 
BELGIUM. 
June  25, 1880. 


GEIO.    D.   WHITQOMB, 

Proprietor, 

No.  206  La  Salle  Street,  Chicago. 
1882. 


OUTSIDE  VIEW. 


LONGITUDINAL  SECTIONAL  VIEW,  SHOWING  SHORT  HANDLES  AND  SHORT  ROD. 


EXPLANATION. 


1.  Piston  Rods,  Long,  Short  or  Medium. 

2  Piston  Rod  Criinp. 

3.  Piston  Ring. 

4.  Bushing. 

5.  Pick. 

6.  Sleeve. 

7.  Lock  for  Sleeve. 

8.  Trunnion. 

9.  Pawl  Pull. 

10.  Cylinder. 

11.  Long  Cylinder  Bolts  (two  of  them). 

12.  Short  Siud  Cylinder  Bolt  (four  of  them). 

13.  Brass  Ring  for  Crimp. 

14.  Exhaust  (h<  ker. 

15.  Foiwnrd  Cylinder  Head. 

16.  Rear  Cylinder  Head. 

17.  Air  Chest  Bolt,  (Front  and  Rear). 

18.  Slide  Valve. 

19.  Valve  Cup. 

20.  Air  Chest. 

21  Pawls.  ( Right  and  Left). 

22.  Cam  and  Shaft. 

23.  Spring  for  Gib. 

24.  Gib. 

25.  Spiral  Wheel  for  Running  Slide  Valve. 

26.  Fly  Wheel. 

27.  Rotary  Head  Gland. 

28.  Roiary  Head. 

29.  Buffer  Plates,  (Front  and  Rear). 
80.  R..tary  Throule. 

31.  Pawl  Spring. 

32.  Foward  Handle  Guide. 

33.  Rear  Handle  Guide. 

34.  Handle  Lntch  and  Spring. 

85.  Bushing  Bolts,  (4  of  them,  countersunk'heads.) 

36.  Pull  Guide. 

87.  Rotary  Gate. 

88.  Rotary  Gate  Cover. 

89.  ''S"  for  Pawls. 

40.  Bolts  for  Gate  Cover  and  Handle  Guide,  (15  of  them,  size,  1  in.  by  |  in.) 

41.  Bolts  for  Rotary  Head,  (sizes,  three  of  them  li  in.  by  i  in.,  and  one  li  in. 

by  i  in.) 

42.  Pawl  Bolts,  (2  of  them,  size,  8|  in.  by  £  in.) 

43.  "  S"  Bolt,  (size,  li  in.  by  |  in.) 

44.  Pawl  Pull  Bolt  and  Nut,  size,  1  in.  by  1  in. 

45.  Supply  Cock. 

46.  Handles. 

47.  Front  Leather  Cushion. 

48.  Back  Leather  Cushion. 

49.  Back  Leather  Filling. 

50.  Front  Leather  Filling. 

51.  Drift. 

52.  Key. 

53.  Handle  Weight. 

54.  Washer  for  Trunnion. 

55.  Wheels,  (Right  and  Left.) 

56.  Oil  Plug. 

57.  Socket  Wrench. 


<- 


CIR-CTJJL.AR    No. 


THE    HARRISON 


MINING  MACHINE 


Since  issuing  Circular  Number  3,  the  undersigned  has 
made  improvements  of  material  value  in  the  machine, 
which  increases  its  capacity  and  enduring  qualities,  and 
reduces  the  cost  of  maintenance  and  amount  of  power 
required  to  run  it.  The  reader  is  referred  to  late  testi- 
monials in  the  back  of  this  circular  regarding  same. 

The  HARBISON  MINING  MACHINE  has  been  in  use  for 
three  years,  and  has  become  a  favorite  with  those  who 
have  used  it  most. 

Its  small  size,  great  strength  and  simplicity  adapts  it  to 
nearly  all  kinds  of  Bituminous  Coal  Mining. 

It  has  no  gears,  levers,  chains,  pulleys,  cutter  bars,  or 
other  complicated  attachments  revolving  under  the  coal  to 
produce  friction  and  consume  power ;  but  it  cuts  an  open 
channel,  under  the  coal,  of  any  desired  vertical  height, 
from  eight  to  twelve  inches  in  front,  and  tapering  to  two- 


The  Harrison  Mining  Machine.  7 

inches  in  the  rear,  the  same  as  if  done  by  skilled  manual 
labor,  while  the  depth  of  the  undercut  can  be  made  from 
three  to  five  feet,  as  desired. 

Another  very  important  feature  is  the  line  of  ihe  wear 
and  concussion  on  the  tool  is  in  the  exact  line  to  give  it  the 
greatest  possible  endurance,  and  admit  of  the  point  being 
supported  by  a  heavy  heel.  Coal  producers  are  requested 
to  take  special  notice  of  this  mechanical  principle,  the 
HARRISON  MINING  MACHINE  being  the  only  one  now  before 
the  public  having  a  motion  that  admits  of  a  reasonable 
support  or  protection  of  the  cutting  points  in  this  respect. 

The  HARRISON  MINING  MACHINE  is  from  five  feet  six 
inches  to  seven  feet  in  length,  from  the  rear  of  the  handles 
to  the  point  of  the  tool.  It  is  only  twenty-four  inches  high 
to  the  top  of  the  throttle,  and  nineteen  inches  wide  over 
all,  therefore  requires  but  little  room,  and  can  be  worked 
around  and  between  props  where  a  miner  can  swing  a  pick. 
It  requires  a  maximum  of  only  sixteen  cubic  feet  of  air 
per  minute  at  forty-five  pounds  pressure  to  run  it,  and  an 
average  of  only  fifteen  cubic  feet  each,  per  minute,  when 
several  machines  are  being  run  from  one  main  pipe  at  the 
same  time,  which  is  fed  to  the  machine  through  a  one-inch 
four-ply  hose.  The  projectile  weighs  from  sixty  to  ninety 
pounds — according  to  the  length  of  the  rod — and  strikes 
from  one  hundred  and  rfinety  to  two  hundred  and  ten  blows 
per  minute.  The  total  weight  of  the  machine  is  from  five 
hundred  and  seventy  to  six  hundred  and  twenty  pounds. 
One  skilled  man  can  operate  it,  and  one  ordinary  laborer  is 
required  to  shovel  away  the  cuttings.  For  ease  in  running 
it,  the  operator  uses  two  boards  of  convenient  size  for  a 
floor,  which  the  laborer  places  in  the  required  position  as 
the  work  progresses.  From  twenty-five  to  fifty  square  yards 

M160482 


8  The  Harrison  Mining  Machine. 

of  floor  is  the  ordinary  amount  undercut  by  one  machine 
each  day.  It  has  often  undercut  from  six  to  eight  square 
yards  of  floor  per  hour,  cutting  time,  but  all  lost  time  for 
moving  and  other  contingencies  are  included  in  this  state- 
ment of  a  day's  work.  The  tools  can  be  sharpened  by  a 
blacksmith,  the  same  as  with  an  ordinary  drill  or  cold 
chisel. 

Only  the  best  of  materials  are  used  in  constructing  the 
machine ;  the  piston  bead  and  rod  are  made  solid  in  one 
piece  and  of  special  homogenious  steel,  and  the  picks  of 
the  best  tool  steel.  All  the  parts  are  shown  on  the  fifth  page 
of  this  circular,  and  are  made  interchangeable,  and  will  be 
furnished  separately  to  customers  for  repairs  when  desired. 
When  ordering  parts  please  use  the  numbers,  letters  and 
names  shown  in  this  circular. 

Several  sizes  of  wheels  are  mable  for  adapting  the  machine 
for  entry  driving  and  shearing. 

When  it  is  desired  for  use  in  very  thin  coal  veins,  the 
throttle  and  hose  connection  is  attached  to  its  side  instead 
of  the  top  as  herein  shown.  This  change  reduces  its  height 
over  all  to  less  than  twenty  inches. 

When  putting  in  pipes  for  conveying  air  to  the  machines 
the  diameter  for  use  in  the  main  and  cross  entries  should  be 
sufficient  to  keep  the  velocity  of  the  air  below  twenty  feet 
per  second.  A  one  and  one-quarter  inch  pipe  is  large 
enough  for  use  in  the  rooms. 

If  parties  desiring  information  regarding  the  adaptability 
of  the  machine  for  use  in  their  coal  will  please  write  and 
answer  the  following  questions,  an  approximate  estimate 
of  cost  of  plant  and  saving  by  the  use  of  the  machine  over 
hand  labor  will  be  returned  in  reply : 

What  is  the  thickness  and  character  of  your  coal  vein  ? 


The  Harrison  Mining  Machine.  9 

Are  there  any  pyrites,  sulphur,  or  any  other  hard  sub- 
stances in  it  that  will  injure  a  heavy  pick? 

What  is  the  character  of  your  roof,  and  distance  you  can 
safely  keep  the  props  from  the  working  face  of  the  coal  ? 

Of  what  is  the  underlying  strata  composed,  and  its  char- 
acter— whether  hard  or  soft  ? 

Do  your  miners  mine  in  it  or  the  coal  ? 

Is  your  coal  vein  horizontal?  If  not,  please  state  its 
average  dip  or  angle. 

What  is  the  width  of  your  rooms  ? 

What  is  your  present  mining  rate?  Is  it  for  mine  run  or 
for  screened  coal  delivered  on  pit  cars,  or  wagons  at  the 
working  face,  or  at  the  switches  at  the  main  road? 

What  is  the  average  daily  product  required  from  your 
mine? 


10  The  Harrison  Mining  Machine. 


KECAHTULATION  OF  CLAIMS. 


First — The  machine  is  small,  simple,  and  durable. 

Second — It  can  be  worked  in  a  very  small  space,  and  re- 
quires only  one  skilled  operator  and  one  laborer  ta 
run  it. 

Third — It  does  not  require  jacks,  tracks,  or  other  mechan- 
ical appliances  to  hold  it  to  its  work. 

Fourth — It  is  not  necessary  to  trim  the  floor,  face  or  side& 
of  the  rooms  where  it  is  to  be  worked. 

Fifth — It  will  do  more  work  for  each  cubic  foot  of  air  con- 
sumed, than  any  machine  in  use. 

The  correspondence  of  coal  producers  who  desire  to  in- 
vestigate mining  machinery  with  a  view  of  using  the  same 
for  their  work,  is  solicited,  and  will  be  given  careful 
attention. 

Respectfully, 

GEO.  D.  WHITCOMB, 

PROPRIETOR, 

206  La  Salle  Street,  Chicago. 


The  Harrison  Mining  Machine.  11 


REFERENCES. 


We  refer  to  the  following  named  parties  who  are  using  the  HARRISON 
MINING  MACHINE  : 

W.  S.  NEARING,  Supt.  Morris  Run  Coal  Mining  Co., 

Morris  Run,  Penn. 
J.  B.  ATKINSON,  Sec'y  and  Treas.  St.  Bernard  Coal  Co., 

Earlington,  Ky. 
E.  J.  CRANDALL,  Manager  Abbey  Coal  &  Mining  Company, 

100  North  Fourth  Street,  St.  Louis,  Mo. 
A.  L.  SWEET,  Gen.  Mg'r.  Chicago,  Wilmington  &  Vermillion  Coal  Co., 

Chicago,  111. 
J.  L.  PLATT,  President  Fort  Dodge  Coal  Company, 

Fort  Dodge,  Iowa. 
W.  B.  BROOKS  &  SON,  Miners  and  Shippers  of  Hocking  Coal, 

Columbus,  Ohio. 
STOUT,  VAN  WICKLE  &  Co.,  170  Superior  Street,  Cleveland,  Ohio. 

C.  REINECKE,  1700  Clark  Avenue,  St.  Louis,  Mo. 
GARTSIDE  COAL  Co.,  516  Olive  Street,  St.  Louis,  Mo. 

D.  KNECHT  &  SON,  522  Pine  Street,  St.  Louis,  Mo. 

CONFIDENCE  COAL  &  MINING  Co.,  12  S.  Commercial  St.,  St.  Louis,  Mo. 
WFSTMORET  AND  COAI  Co    \  23°  So'  Third  St"  Philadelphia,  Pa. 

,ELAND  COAL  CO.,  -  )   pa 


CONSOLIDATED  COAL  &  MINING  Co.,  Cincinnati,  O. 

DONK  BROS.  &  Co.,  522  Olive  Street,  St.  Louis,  Mo. 

NORTH  WESTERN  MINING  &  EXCHANGE  Co.,  Dagus  Mines,  Pa. 

COAL  VALLEY  MINING  Co.,  Rock  Island,  111. 

LATHROP  COAL  &  MINING  Co.,  Kewanee,  111. 

CHICAGO  &  VAN  METER  COAL  Co.,  Van  Meter,  Iowa. 

NEW  YORK  &  OHIO  COAL  Co.,  Sherodsville,  Ohio. 

LEAVENWORTH  COAL  Co.,  Leavenworth,  Kansas. 

E.  G.  SAVAGE,  Manager  TRINIDAD  COAL  &  COKING  Co.,  Starkville,  Col. 

MKKDOT,  CoAL  *  MININ«  Co.,  \  *™*  "«»»«• 
W.  P.  REND  &  Co.,  Chicago,  111.,  and  McDonald,  Pa. 


Testimonials. 


TESTIMONIALS. 


E.  G.  SEBREE,  Pres't.  J.  B.  ATKINSON,  Sec'y  and  Treas. 

ST.  BERNARD   COAL  COMPANY, 

EARLINGTON,  KY.,  November  22d,  1881. 
GEORGE  D.  WHITCOMB,  ESQ. 

Dear  Sir  :  Our  eighteen  months'  experience  with  the  "  Harrison  "  has  been 
very  interesting  and  profitable.  The  machine  is  a  success,  and  we  would  not 
be  without  it.  It  reduces  the  cost  of  getting  coal  25  to  33  per  cent,  and  we 
expect  to  make  a  still  greater  margin. 

It  takes  time  to  systematize  the  new  way  in  old  workings,  but  we  can  show 
the  above  result.  Our  miners,  who  have  been  fortunate  enough  to  get  a  ma- 
chine, like  it  so  well  that  they  can  not  be  induced  to  go  back  to  the  old 
method,  but  any  one  can  readily  operate  the  machine — requires  practice,  of 
course,  to  become  proficient.  Your  machine  does  all  you  claim  for  it. 

Yours  truly, 

JNO.   B.  ATKINSON,  SEC'Y. 

E.  G.  SEBREE,  Pres't.  J.  B.  ATKINSON,  Sec'y  and  Treas. 

ST.   BERNARD   COAL  COMPANY, 

EARLINGTON,  KY.,  October  5th,  1882. . 
GEORGE  D.  WHITCOMB,  ESQ., 

Dear  Sir :  We  have  given  your  new  improved  machine  a  good  trial,  and 
find  several  improvements  over  the  old  one.  The  packing  crimp  is  far  supe- 
rior to  the  old  system  of  packing. 

We  hope  to  want  more  machines  shortly. 

JNO.  B.  ATKINSON,  SEC'Y. 

OFFICE    OF 

THE   MORRIS  RUN  COAL  MINING  CO., 
W.   S.  NEABING,  Sup't. 

MORRIS  RUN,  PA.,  November  23d,  1881. 
GEORGE  D.  WHITCOMB,  Proprietor 

Harrison  Mining  Machine,  206  LaSalle  St.,  Chicago,  111. 
Dear  Sir:   We  continue  to  use  the  Hirrison  Coal  Cutters,  and  with  the 
greatest  satisfaction.     The  machine  is  of  great  value  in  headings  which  are 
to  be  driven  into  new  territory,  as  well  as  in  chambers. 

After  using  these  machines  during  several  years,  it  is  a  pleasure  to  say,  they 
are  very  desirable,  useful  and  economical ;  in  fact,  we  regard  them  as  in- 
dispensable.  Yours,  very  truly, 

W.  S.  NEARING,  SUP'T. 


Testimonials.  13 

OFFICE   OP  THE 

ABBEY   COAL  AND  MINING  COMPANY. 

GENERAL  OFFICE,  100  N.  FOURTH  ST., 

ST.  Louis,  Mo.,  August  21st,  1882. 
GEORGE  D.  WHITCOMB,  ESQ., 

Dear  Sir :  The  new  machine  which  you  sent  us  the  latter  part  of  July  has- 
been  at  work  steadily  since  July  31st.  Being  new  and  somewhat  different  in 
its  requirements  from  the  older  machines,  Kneedler  (who  is  running  it),  has 
been  about  a  week  getting  used  to  its  peculiarities;  but  has  now  begun  to 
show  very  good  work,  and  I  send  you  herewith  his  work  for  the  past  week. 
On  Monday,  August  7th,  the  mine  did  not  work,  owing  to  repairs  being  made 
on  the  boilers. 

Tuesday,  August   8th,  he  cut 135  lineal  feet. 

Wednesday,    "       9th,      "     80     " 

Thursday,       "      10th,      " 130      " 

Friday,  "      llth,      "     130      '• 

Saturday,         "      12th,      "    125     " 

Monday,          "      14th,      " 125     " 

Or 725  lineal  feet. 

For  his  week's  work.    I  include  the  Monday's  work  to  onset  the  idleness  of 
the  Monday  previous. 

"We  are  very  much  pleased  with  the  working  of  this  machine,  and  I  would 
like  two  more  of  this  pattern  as  soon  as  you  can  spare  them.  The  under* 
cutting  was  done  to  a  depth  of  four  and  a  half  feet. 

Yours  truly, 

W.  R.  GRAND  ALL,  SEC'Y. 


CHICAGO,    WILMINGTON  &  VERMILLION  GOAL  CO. 

CHICAGO,  December  23d,  1881. 
Mines  at  Braidwood  and  Streator,  111. 

GEO.  D.  WHITCOMB,  ESQ., 

Chicago,  111. 

Dear  Sir:  We  have  ten  of  your  Harrison  Coal  Cutters  at  work  in  our 
mines  at  Braidwood,  and  thirteen  at  Streator.  We  have  cut  as  high  as  2$ 
feet  of  entry  per  day  of  ten  hours,  with  one  machine. 

We  are  undercutting  from  three  to  four  rooms,  21  feet  wide,  4£  feet  under 
per  day,  with  each  machine,  which  is  an  average  of  30  tons  to  each  machine, 
besides  doing  considerable  entry  drivin 

The  coal  mined  by  these  machines  costs  us  20  cents  per  ton  less  than  by 
the  regular  miner.  We  expect  to  equip  our  Streator  mines  next  summer 
entirely  with  these  machines, 

Yours  truly, 

A.  L.   SWEET,  GEN'L  MANAGER. 


/^  Testimonials. 

PURCHASING   AGENT'S   OFFICE 

MORRIS  RUN  COAL  MINING   CO., 
(ORDER  133.) 

CORNING,  N.  Y.,  October  3d,  1882. 
GEORGE  D.  WHITCOMB  : 

Please  furnish  on  account  of  this  company,  the  following  materials  :  three 
Harrison  Mining  Machines. 

A.  BEERS,  PURCHASING  AGENT. 

OFFICE  OF 

C.  REINECKE,   OPERATOR  AND  DEALER  IN  COAL, 
1700  Clark  Avenue, 

ST.  Louis,  Mo.,  November  17th,  1881. 
Mines  on  Louisville  &  Nashville  R.  R. 
GEORGE  D.  WHITCOMB,  ESQ., 

Chicago,  111. 

Dear  Sir:  I  have  been  using  your  Harrison  Mining  Machine  in  my  mines 
for  the  past  fifteen  months,  and  I  can  cheerfully  say  that  they  have  given 
entire  satisfaction  in  every  respect,  and  I  am  sure  they  far  excel  any  mining 
machine  in  the  market.  They  are  light  and  portable,  easy  to  move  about, 
no  chains  breaking,  thereby  causing  expense  and  delay,  and  do  not  require 
near  as  much  power  as  other  machines  to  run  them;  and,  furthermore,  they 
are  simple  and  men  can  be  esisily  taught  to  run  them.  I  have  been  mining 
on  an  average  of  1,200  bushels  of  coal  per  day  with  each  machine,  in  a  six 
(6)  feet  vein,  and  I  can  cheerfully  recommend  your  machine  to  any  one. 
Hoping  you  much  success,  I  remain 

Very  truly  yours, 

Mines  at  Birkner's  Station  and  Belleville,  111.  C.  REINECKE. 


OFFICE    OF 

C.  REINECKE,  1700  CLARK  AVENUE. 

(MINES  AT  BELLEVILLE,  ILL.) 

ST.  Louis,  Mo.,  October  3d,  1882. 
GEO.  D.  WHITCOMB  : 

Dear  Sir :  Victor  Gardner  cut  with  one  of  your  new  machines  in  my 
mine  605  lineal  feet  face,  to  a  depth  of  four  feet  in  six  days  of  ten  hours  each. 
I  believe  the  new  machines  an  improvement  upon  the  old  in  regard  to 
capacity,  strength  and  endurance. 

Yours  truly,  C.  REINECKE. 


_  ST.  Louis,  September  25th,  1882. 

GEO.  D.  WHITCOMB  : 

You  will  please  send  me,  just  as  soon  as  you  possibly  can,  two  more 
machines,  the  same  pattern  as  the  last  two  new  ones  you  sent.  You  will 
please  let  me  know  how  soon  you  can  send  them. 

Yours,  C.  REINECKE. 


Testimonials.  15 

KEWANEE,  ILL.,  December  6th,  1881. 
OEO.  D.  WHITCOMB,  ESQ., 

Chicago. 

Dear  Sir :  I  am  in  receipt  of  yours  of  the  30th  ult.  In  response  to  your 
request  for  information  touching  my  experience  in  the  use  of  the  Harrison 
Mining  Machine,  I  submit  the  following:  I  have  them  in  use  for  the  Fort 
Dodge  Coal  Co.,  near  Fort  Dodge,  Iowa,  and  for  the  Chicago  and  Van  Meter 
Coal  Co.,  at  Van  Meter,  Iowa,  in  one  mine  only  at  each  place.  At  the  former 
place  we  run  two  during  the  day  shift  and  only  one  at  night.  Product,  from 
100  to  125  tons  per  day.  The  undercutting  costs  us  about  an  average  of  18 
<jents  per  ton,  and  the  balance  of  the  work,  including  the  delivery  of  coal 
to  the  mule  track,  we  have  contracted  at  a  saving  of  60  cents  per  ton  under 
the  regular  price  paid  where  mining  is  included,  working  a  saving  over  all 
of  43  cents  per  ton,  as  compared  with  same  work  when  machines  are 
not  used.  At  the  Van  Meter  Mine  we  are  not  yet  fully  organized  for  the 
use  of  the  machines  systematically,  but  have  the  air  power  set,  and  intend 
to  run  four  to  six  machines  there  soon.  It  is  my  intention  to  introduce 
them  into  all  new  openings  hereafter. 

Respectfully,  J.  L.  PLATT,  PRES'T, 

Fort  Dodge  Coal  Co. ,  and 

Chicago  and  Van  Meter  Coal  Co. 


Raton  Coal  and  Coking  Co.,  Trinidad  Coal  and  Coking  Co. 

Karon,  N.  M.  OFFICE  OF  Starkville,  Col. 

Canon  City  Coal  Co  ,  E.  Wilder,  Tivas.  Coal  Cos., 

Rockvale,  Col.  E.  G.   SAVAGE,  Topeka,  Kan. 

Manager  Coal  Companies  in  Colorado  and  New  Mexico. 

RATON,  N.  M.,  February  25th,  1882. 
GEO.  D.  WHITCQMB,  ESQ., 

Chicago,  111. 

Dear  Sir:  *  *  *  *  The  machines  work  splendid  and  do  all  you 
-claim.  *  *  *  *  I  will  have  no  hesitancy  in  recommending 
your  machines. 

Yours  truly, 

E.  G.  SAVAGE,  MANAGER. 


RATON,  N.  M.,  July  31st,  1882. 
<TEO.  D.  WHITCOMB. 

Dear  Sir:  Yours  of  the  25th  received  and  contents  noted.  *  *  *  * 
We  work  the  machines  in  the  new  mine.  I  am  much  pleased  with  them, 
and  as  soon  as  we  get  in  full  blast,  will  need  more  machines. 

Yours  truly, 

E.  G.  SAVAGE,  MANAGER. 


16  Testimonials. 

THE  COLORADO  COAL  AND  IRON  COMPANY, 
GEORGE  U.  ENGLE,  Sup't. 

EL  Mono,  COL.,  December  15th,  1881. 
GEO.  D.  WHITCOMB,  ESQ. 

Dear  Sir:  The  following  is  the  result  of  a  trial  of  two  Harrison  Coal  Min- 
ing Machines,  made  this  clay  at  El  Moro  Miae: 

No.  1.        30  lineal  feet,  4  feet  4  inches  under — Room  on  face. 

8  "        "     4    •'     4     "          "     —Break  through  on  Butt. 
21     u        "      4     "     8     "          "     —Room  on  face. 

9  "        "     4    "     0      "          "      —Break  through  on  Butt. 
12     "        "     4     "     4     "          "     —Room  on  face. 

9    "         "      4    "     4     "          "     —Break  through  on  Butt. 

30  "         "     4    "     4     "          "     —Room  on  face. 

119  lineal  feet.     Time— Nine  hours,  fifteen  minutes. 

No.  2.        21  lineal  feet,  4  feet  6  inches  under — Room  on  face. 

7    "        "      4    "    4    "  «•      —Break  through  on  ButU 

31  "        "      4    "    4    "  "     —Room  on  face. 

59  lineal  feet.    Time— Four  hours,  fifty  minutes. 

Owing  to  want  of  time  to  make  preparations  for  this  trial,  we  could  not 
give  the  machines  sufiicieut  face  for  their  full  capacity. 

Yours  truly, 

GEO.  U.  ENGLE,  SUP'T. 

OFFICE  OF   SUPERINTENDENT  OF 

WESTMORELAND  COAL  COMPANY. 

IRWINS  STATION,  PA.,  October  14th,  1882. 
GEO.  D.  WHITCOMB,  Proprietor  Harrison  Mining  Machine. 

Dear  Sir:  The  following  is  the  result  of  a  week's  run  with  one  of  your 
Harrison  Mining  Machines  in  rooms  60  feet  wide  at  our  Westmoreland 
Shaft  :— 

Running  Time.        Lineal  Feet.  Depth.  Square  Feet. 

October  2.  7.80  78.0  4  ft.  6  in.  351 


3.  8.15  83.0  4* 

11       4.  9.00  89.0  4  ' 

"        5.  9.30  93.0  4' 

"       6.  9.30  91.0  4' 

"       7.  8.00  81.0  4' 


374 
400 
418 
409 
3t>5 


Total 51.45  515.0  4  ft.  6  in.  2,317 

Per  day 8.37  85.10  386 

Per  hour 10.0  45 

Total  working  time,  60  hours;  running  time,  51  hours  45  minutes;  loss,. 
8  hours  15  minutes.  This  includes  eight  changes  from  one  room  to  another, 
and  some  delays  in  getting  away  the  coal.  The  product  for  the  week  was 
299  tons,  or  50  tons  per  day.  Yours  very  truly, 

LEWIS  STOCKELL,  ENGINEER. 


M160482 

77V// 


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